alamb commented on issue #6430:
URL: https://github.com/apache/arrow-rs/issues/6430#issuecomment-2365132687

   @ShiKaiWi  I would recommend:
   1. Start with a single array type (perhaps BooleanArray)
   2. Add an example of using the `into_builder` as a doc comment
   
   Perhaps initially start with something like this
   ```rust
   let arr: BooleanArray = vec![true, true, false].into();
   let mut builder = arr.into_builder()
   // Append 2 new rows
   builder.append_value(false);
   builder.append_null();
   let arr = builder.finish();
   assert_eq!(....)
   ```


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